Корозійно-діагностичний моніторинг підземної сталевої газотранспортної мережі

Abstract

In the article the dynamics of emergencies in gas transportation network, which was caused by corrosion of the metal underground pipeline. The object of study – factors that affect the rate of occurrence of corrosion processes in underground steel gas distribution networks. Purpose – evaluation of the bearing capacity and residual life distribution networks with corrosion defects and determining the corrosion rate of the body tube. The most significant factors affecting the rate of occurrence of corrosion processes is the thickness of the protective coating, quality grade of steel, the density of the cathode current, the life of the pipeline and the electrical resistivity of the soil. Determining the rate of corrosion may determine the remaining life of gas network areas, degree of danger and corrosion protection over time. A study in the article allows research to establish that effective protection time for study section of the pipeline was absent, and the corrosion of the gas network was aggravated because of the unstable polarization, which was established current cathodic protection installations. Therefore, to increase the exploitation of underground steel pipelines proposed as a means of protection against corrosion of deep anodic grounding of saturated metal concrete.